* {
    margin: 0;
    padding: 0;
    list-style: none;
}
.box {
    width: 1060px;
    height: 622px;
    margin: 0px auto;
    border: 2px solid black;
    position: relative;
    display: flex;
    justify-content: space-between;
    overflow: hidden;
}
.da {
    width: 853px;
    height: 592px;
    position: relative;
    cursor: move;
}

ul{
    position: relative;
    top: 0;
    transition: all .2s linear;
}

ul>li {
    width: 100%;
    padding: 15px;
}
ul>li img{
    display: block;
        width: 100%;
        height: 100%;
    
}

.xiao {
    height: 622px;
    position: relative;
}

ol {
    position: relative;
    top: 0;
    transition: all .2s linear;
}

ol > li{
    padding: 8.5px 4px;
}

ol>li img {
    display: block;
    width: 193px;
}

/* .kuang {
    width: 193px;
    height: 110px;
} */
.xiao > span{
    position: absolute;
    right: 40%;
    padding: 10px;
    font-size: 12px;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.361);
    border-radius: 20px;
    z-index: 10;
}
.prev{
    top: 0;
}
.next{
    bottom: 0;
}
.border{
    width: 193px;
    height: 139px;
    border: 4px solid #000;
    position: absolute;
    top: 4px;
    right: 0;
    transition: all .2s linear;
}
.border > span{
    position: absolute;
    width: 0;
    height: 0;
    border: 10px solid #000;
    border-color: transparent;
    border-right-color: #000;
    left: -20px;
    top: 65px;
}



.mask {
    display: none;
    position: absolute;
    width: 411.5px;
    height: 296px;
    top: 0px;
    left: 0px;
    border: 1px solid #ccc;
    background: yellow;
    opacity: .5;
}

.big {
    display: none;
    position: absolute;
    width: 823px;
    height: 592px;
    top: -1px;
    left: 411px;
    border: 1px solid #000000;
    overflow: hidden;
}

.big img {
    position: absolute;
    width: 1646px;
    height: 1184px;
    left: 0px;
    top: 0px;
}